drum rolls

He's even built a solar cooker, collects rain to water the plants and even made a washing machine out of a plastic drum that rolls in the waves.

他甚至还建造了太阳能炊具，收集雨水来灌溉作物，甚至还用一个海浪吹来的鼓制作了一个洗衣机。

The machine is consisted of big drum, applicator rolls, scraper and automatic control system.

整机由大滚筒系统、布料系统 、 刮刀系统和自控系统等组成.

These rolls are corrugated cylinders, usually of the spiral type. Cutting and Precision Form of Helical Vane of Shearer Drum

粉碎辊是波纹式滚筒，还常是螺旋割纹式。采煤机滚筒螺旋叶片的下料及辗压成形

these are the drum rolls, and drag-and-shoot in different parts of the pressure is inconsistent.

这都是滚筒转动时，叼口及拖梢部位不张力不分歧所变成。